Granted Patent
Utility
US 4,427,632 · App. 06/370,854
Analytical element
Inventors:
Kenichiro Okaniwa, Mikio Koyama, Shozo Kikugawa
Patented Case
View Patent ↗
Granted: Jan 24, 1984
Filed: Apr 22, 1982
Inventors
Kenichiro Okaniwa
Mikio Koyama
Shozo Kikugawa
Assignee (at issue)
Konishiroku Photo Industry Co., Ltd.
This patent predates the USPTO's electronic file wrapper — prosecution documents from this era exist only in the Patent Office's paper records. A certified copy of the file history can be ordered from the USPTO's paper archives.